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Finding the Fourth Proportional to 619.05, 854.28 and 356.97

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Solution

The fourth proportional to 619.05, 854.28 and 356.97 is: 492.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.05 : 854.28 = 356.97 : x
  2. Step 2: Convert to fraction form
    619.05/854.28 = 356.97/x
  3. Step 3: Cross multiply
    619.05x = 854.28 × 356.97
  4. Step 4: Simplify right side
    619.05x = 304,952.33
  5. Step 5: Solve for x
    x = 304,952.33/619.05
  6. Step 6: Final answer
    x = 492.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.